Internationally known environmentalist Greta Thunberg has been an inspiration to many. At the same time, others have criticized or belittled her efforts to draw attention to environmental issues. What is the basis for this criticism?
a. The environmental movement does not have clear goals or objectives.
b. There are not very many people who support the environmental movement.
c. Social movements are often subject to criticism by those who do not want change.
d. Leaders of social movements often acquire their positions through illegitimate means.